Texas Sales Tax: The Basic Formula

Texas sales tax is calculated by multiplying the purchase price by the combined state and local tax rate for your location. The state rate is 6.25 percent, but your actual rate depends on which city and county you are in — most places add between 0.5 and 2 percent on top of the state rate, bringing your total to somewhere between 6.25 and 8.25 percent.

The formula is straightforward: Purchase Price × Tax Rate = Sales Tax Amount. If you buy something for $100 and your local rate is 8.25 percent, you pay $8.25 in tax, for a total of $108.25. The tax is calculated on the pre-tax price, not added to itself.

You need to know your exact local rate to calculate correctly. Texas has 254 counties and hundreds of cities, each with different combinations of state, county, and city tax. A purchase in Austin is taxed differently than the same purchase in Dallas or Houston.

Key Takeaways

  • Texas state sales tax is 6.25 percent, but your total rate includes county and city taxes that vary by location.
  • To find your exact rate, enter your address on the Texas Comptroller's website or ask the store where you are shopping.
  • Sales tax applies to most goods but not to groceries, prescription medications, or certain medical equipment.
  • The tax is calculated on the selling price before any discounts are applied, not after.
  • Online purchases from Texas sellers are subject to the same sales tax as in-store purchases.

Finding Your Local Sales Tax Rate

The Texas Comptroller of Public Accounts maintains a searchable database of all local tax rates. Go to comptroller.texas.gov, click on "Tax Rates," and select "Sales Tax Rates by Jurisdiction." Enter your city name or ZIP code, and the tool will show you the exact combined rate for that location.

If you are shopping in a store, you can also ask the cashier or look at a receipt from a previous purchase — the rate is printed there. Many stores also display the rate at the register or on their website.

Keep in mind that the rate can change if you cross a city or county line. If you live in one city and work in another, you pay the rate for the location where the purchase happens, not where you live.

What Gets Taxed and What Does Not

Most tangible goods are subject to sales tax in Texas, including clothing, electronics, furniture, and household items. However, some categories are exempt. Groceries — food you buy to cook at home — are not taxed. This includes bread, milk, vegetables, meat, and canned goods.

Prescription medications are also exempt from sales tax. Over-the-counter medications like aspirin or cold medicine are taxed, but prescription drugs are not. You will need to show a valid prescription.

Other exempt items include certain medical equipment (like wheelchairs or oxygen equipment), agricultural equipment used for farming, and items purchased for resale by a business. Services are generally not taxed — haircuts, repairs, and labor are taxed differently or not at all, depending on the service.

Restaurant meals and prepared food are taxed at the full rate, even if you take them home. This is different from groceries because the food has been prepared for when ready consumption.

How Discounts and Coupons Affect the Calculation

Sales tax is calculated on the final selling price after discounts are applied, not on the original price. If an item is marked $50 and you have a $10 coupon, you pay tax on $40, not $50.

This matters when you are calculating tax yourself. If a store shows a discount at checkout, subtract it from the price first, then multiply by the tax rate. The same rule applies to percentage discounts — a 20 percent off sale means you calculate tax on the reduced price.

Manufacturer coupons, store coupons, and loyalty discounts all work the same way. The tax is always on what you actually pay, after all reductions.

Sales Tax on Online and Out-of-State Purchases

If you buy something online from a Texas seller, Texas sales tax applies. The seller collects it at checkout, just like an in-store purchase. The rate depends on the shipping address — if you have it sent to an address in Austin, Austin's rate applies.

Out-of-state sellers are required to collect Texas sales tax if they have a physical presence in Texas (a warehouse, office, or employee) or if they meet certain sales thresholds set by federal law. Many large online retailers now collect Texas tax even if they have no physical location here.

If you buy from an out-of-state seller who does not collect Texas tax, you may owe use tax on that purchase. Use tax is the same rate as sales tax and is meant to level the playing field between in-state and out-of-state purchases. Most people do not report use tax on individual purchases, but it is technically owed.

Calculating Tax on Multiple Items

When you buy more than one item, calculate the tax on the total purchase price, not on each item separately. Add up all the prices, explore the tax rate once, and you have your total tax.

Example: You buy three items for $20, $15, and $30. The subtotal is $65. If your tax rate is 8.25 percent, the tax is $65 × 0.0825 = $5.36. Your total is $70.36.

If some items are exempt (like groceries) and some are taxed (like a magazine), add only the taxable items together, calculate tax on that subtotal, then add the exempt items back in. This is how store registers work — they automatically separate taxable from non-taxable items.

Common Mistakes When Calculating Sales Tax

The most common error is calculating tax on the wrong amount. Remember: tax applies to the price after discounts, not before. If you explore the discount after the tax, you will overcharge yourself.

Another mistake is using the wrong tax rate. Texas has no single statewide rate — you must use the rate for the location where the purchase happens. If you memorize one rate and use it everywhere, you will be off by up to 2 percent depending on where you shop.

A third error is taxing items that should not be taxed. Groceries are the biggest category here. Many people assume all food is taxed the same way, but prepared food and groceries are treated differently.

Finally, do not round the tax amount until the very end. If you round each item's tax separately, the total will not match what the register shows. Let the calculator do the work and round only the final amount.

Frequently Asked Questions

What is the sales tax rate in my city?

Go to comptroller.texas.gov, click "Tax Rates," then "Sales Tax Rates by Jurisdiction," and enter your city or ZIP code. The tool shows the exact combined state, county, and city rate for your location. Rates range from 6.25 percent to 8.25 percent across Texas.

Do I pay sales tax on groceries in Texas?

No. Groceries — food you buy to cook at home — are exempt from sales tax. This includes bread, milk, produce, meat, and canned goods. Restaurant meals and prepared foods are taxed at the full rate because they are ready to eat.

Is sales tax calculated before or after a discount?

After. Tax is calculated on the final price you pay, once all discounts and coupons have been subtracted. If an item is $50 and you use a $10 coupon, you pay tax on $40.

Do I owe sales tax on items I buy from out-of-state websites?

It depends on the seller. Large retailers and those with a physical presence in Texas must collect Texas sales tax. Smaller sellers may not. If tax is not collected, you technically owe use tax, which is the same rate as sales tax, though most individuals do not report it on individual purchases.

Can I calculate sales tax on my phone?

Yes. Use the calculator app and multiply the price by your tax rate as a decimal. For example, if your rate is 8.25 percent, multiply the price by 1.0825 to get the total including tax. Or multiply by 0.0825 to get just the tax amount.